The air flow is not a problem as the lid is perforated (Collins S-Line
style enclosure) and all the circitry EXCEPT for the HV lead to the
annode is much lower in the chassis. Thanks for the input.
Michael J. Tubby B.Sc. (Hons) G8TIC wrote:
>----- Original Message -----
>From: "Jim Isbell" <millenniumfalcon@cableone.net>
>To: "Mail list Amplifiers" <amps@contesting.com>
>Sent: Saturday, June 14, 2003 5:59 PM
>Subject: [Amps] Anode clearance and Chassis WANTED
>
>
>
>
>>I am building a 4-1000A linear and will have 4KV on the anode. What is
>>the MINIMUM clearance I must have from the anode to the top of the metal
>>cabinet? It looks like it will be about 1" in my present configuration.
>> Will that be sufficient to prevent any problems?
>>
>>
>>
>
>Depends what 'problems' you are thinking of...
>
>* an air gap of 25mm has more than enought dialelectric strength to deal
>with
> 4Kv DC + many Kv of RF
>
>* you might have an issue with stray C on higher bands, like 28MHz,
>depending
> on how much circuitary is close to the lid
>
>* you might have problems with restricted air-flow
>
>
>
>
>>I am looking for a chassis 14"x13.25"x3.25".........may have to go to a
>>shorter one if the answer to above question is NO but really need the
>>3.25" for the input tuning box to fit.
>>
>>
>>
>
>Mike G8TIC
>
>
>
>
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